Motor compressor



April- 9, 1935. R. P. PEscARA MOTOR COMPRESSOR Filed Jan. 5, 1933 2 Sheets-Shet 2 a [22 ran fan 751a zz B2 ferasfiscam Patented Apr. 9', 1935 PATENT OFFICE MOTOR COMPRESSOR Raul Pateras Peseara, Paris, France Application January 5, 1933, Serial No. 650,350

In France July 5, 1932 Claims. (01. 290-56) The present invention relates to motor com pressors of the type in which two compressing pistons are adapted to move in opposite directions under the direct action of the internal combustion 5 of a fuel.

The object of the present invention is to'provide a motor compressor of that type which is moresimple, comprises a lesser number of parts, and is easier to manufacture.

A preferred embodiment of my invention will be hereinafter described with reference to the accompanying drawings, given merely by way of example, and in which:

Fig. 1 is an elevational view, partly in section, of a motor compressor according to the present invention;

Fig. 2 is a horizontal axial section of said motor compressor; Fig.-3 is a composite view, the right hand side of which is a section on the line A3 of Fig. 1, and the left hand side of which is a section on the line CD of Fig. 1. I h

,Fig. 4 is an elevational view, partly in section, of a complete motor compressor.

According to my invention all the stationary parts of themotor compressor form a unit 1.

which comprises: r

(a) Three cylinders (compression'cylinder IM provided with longitudinal grooves H and connected with delivery pipe I05 through" outlet .valves I83, motor cylinder I02, the ends of which are provided with cooling fins 24 and with a piece screwed thereon and fitted with packing rings 26, and another compression cylinder I", similar to cylinder Ill);

(b) A chamber 2| carried by each compression cylinder, connected with'the atmosphere through openings 20 provided with air inlet valves l9, and connected with the inside of the compression cylinder through a'port Z2;

(c) A casing I04 inclosing a chamber l2 having a bottom closure l3 forming the scavenging air reservoir, which extends along the whole length of the compressor and is connected with motor cylinder ll! through ports H;

(d) A chamber l5 carried by each'compression cylinder Ill, connected with the inside of said cylinder through ports 3II'andwith chamber 12 through ports it provided with valves ll;

(e) Two longitudinal external recesses 8 provided on either side of said casing "4, closed on the outer side by plates 9, and connected with chamber I! through ports ll; said recesses are disposedl along grooves ll of compression cylinder ll Two pistons such as 2 are fitted in said cylinders in such manner. that their outer ends reciprocate in the compression cylinders respectively and their inner ends (of reduced section) reciprocate in motor cylinder I02. The inner 5 faces of the enlarged ends of the pistons are provided with an annular recess?! for receiving the end of the motor cylinder.

The pistons are connected together through rods 3 pivoted at one end about journals ,4 pro- 10 vided on the pistons, and at the other end to cranks 5 pivoted about journals 6 fitted in unit I.

Journals 4 also carry sliding members I adapted to reciprocate in a piston-like manner in guiding recesses 8. The inner face of said sliding l6 members is provided with a plate It adapted to cover the portion of groove ll located between saidjournal 4 and the inner end of said groove.

The operation of the apparatus isas follows:

The piston starts from its innermost position. 20 It compresses air in the compression cylinder until valves l1 open so that air from the com-- pression cylinder is discharged into the scavenging air reservoir I! through ports 30, chamber l5, and ports it. As the piston further moves it closes 25 ports II and at so that there is no longer any connection between the compression chamber and chamber l5. But pistons I keep driving compressed air into reservoir 12. Piston 2 now compresses air in cylinder Ifll. It comes to cover port 22 so that there is no longer any connection between'cylinder llll and chamber 2|. Toward the end of the stroke the outlet valves I03 open and air is'discharged into delivery pipe I05. At the end'of the outstroke said outlet valves closeand 5 the compressed air remaining in the cylinder drives back the piston. when said piston uncovers port 22, valves l9 open and fresh air is admit ted into the cylinder.

While I have described what I deem to be a 0 preferred embodiment of my invention, it" should be well understood that I do not wish to be limited thereto as there might be changes made in the arrangement, disposition and form of the parts without departing from the principle of my invention as comprehended the appended claims.

What I clazm is:

1. A motor compressor of the type described comprising in combination, a motor cylinder, two compression cylinders integral with said motor cylinder and disposed on opposite sides thereof and coaxially therewith, two opposed pistons the izmer ends of both of which reciprocate in the motor cylinder and the outer ends of which rewithin the scope of ciprocate in the compression cylinders respectively, a guide for said pistons integral with said cylinders, and a casing integral with said cylinders and surrounding them so as to form a reservoir for the compressed air for scavenging the motor cylinder.

2. A motor compressor of the type described comprising in combination, a motor cylinder, two compression cylinders integral with said motor cylinder and disposed on opposite sides thereof and coaxially therewith, each of said compression cylinders being provided with two diametrally opposed longitudinal slots, two opposed pistons the inner ends of which reciprocate in the motor cylinder and the outer ends of which reciprocate in the compression cylinders respectively, two diametrally opposed journals carried by each of said pistons and engaging said slots, two guides for said journals integral with said compression cylinders, sliding members adapted to act in piston like manner in said guides pivoted about said journals,

and a. casing integral with said cylinders and surrounding them so as to form a reservoir for the compressed air for scavenging the motor cylinder.

3. A motor compressor according to claim 2 further comprising two journals carried by said motor cylinder, two opposed cranks pivoted about each of said journals, and connecting rods articulated at one end to one of said cranks and pivoted at the other end about the first mentioned journals respectively.

4. A motor compressor according to claim 1 further comprising check valves for connecting the said compression cylinders with said scavenging reservoir, and a chamber for said valves integral with said compression cylinders.

5. A motor compressor according to claim 2 further comprising check valves for connecting said compression cylinders with said scavenging air reservoir, and a chamber for said valves integral with said compression cylinder.

RAUL PATERAS PESCARA. 

